Tests de lentilles !! Cmt les lire ?

[Leodium]

Bête question...

Voici des résultats de contraste (MTF50 (Line Width/Inch on the Print) @ 80mm):

Height(in) ? Ca veut dire quoi ? Hauteur ?

[Oriu]

c'est en rapport à la taille d'impression, ce test provient d'un site de numériqueux avec un objectif de MF monté sur un APSC, du grand n’importe quoi

[Leodium]

(oui, je sais mais j'ai rien d'autres )

Donc, height(in) = la taille d' "impression"... Merci... :p

[apx25]

Height(in) ? Ca veut dire quoi ? Hauteur ?

Hauteur, en pouces (in = inches)

[apx25]

Line Width/Inch on the Print : c'est un test d'objectif d'agrandisseur ?

[Oriu]

le texte en relation à ce tableau (je n'ai pas donné le lien, c'est un site de numérique)

"Mamiya 645 80mm f/1.9 showcased pretty decent overall results on an APS-C body. Center performance is good throughout the aperture range, but border image quality suffers a little bit at wider apertures. Border quality at f/1.9 is not very impressive, even mediocre. Stop down the aperture a bit and quality reaches very respectable level and gets even better in the f/4-f/11 range. With the exception of the f/1.9-f/2.8 range, the lens shows pretty balanced performance across the frame, which is obviously a great characteristic in any lens. At its peak in the f/4-f/8 range the lens is capable of producing outstanding 19in prints and decent 24in prints almost throughout the rest of the aperture range (exception here is f/1.9). Conclusion? Some softness around borders at f/1.9. Is this bad? It's certainly pretty common among fast lenses, wide angle and telephoto alike. Other then that, pretty solid performer."